Feature

Dead Men’s Heads Carved on Ancient Temple in Peru

Ancient Rocks Identified by Two Trilobite Genera

Pueblo War Songs Link Indians with Far East

Iron Masses under Meteor Crater Shown Magnetically

New Swedish Process Freezes Salt from Ocean

Animals of Cooler Regions Larger than Warm-Land Kin

Tandem Propellers for Planes Turn in Opposite Directions

U. S. Joins 14 Other Nations Using Robot Radio Alarm

Draw-Casting New Trick in Making Copper Rods

In Science Fields

Spring Comes

New Lamps Join Familiar Bulbs to Brighten Life